Comparative incidence of the rearrangements of TEL/AML1 and ALL1 genes in pediatric precursor B acute lymphoblastic leukemias in India

Int J Oncol. 1998 Dec;13(6):1319-22. doi: 10.3892/ijo.13.6.1319.

Abstract

The TEL/AML1 translocation, which is specific for pre B-cell leukemias is predictive of a favorable treatment outcome. In contrast, translocations involving the ALL1 locus which are associated with both B and non B leukemias predict a poor outcome. To determine the relative distribution of high and low risk molecular subtypes of ALL in India, we analyzed the relative frequencies of these two translocations. The study included a random selection of 46 newly diagnosed patients of childhood ALL from the Tata Memorial Hospital, Bombay, India. Similar to the frequency observed in other world regions, we found an All1 rearrangement in less than 7% (3/46) of pre B-ALL patients. In contrast to the 25% frequency reported for other regions the low risk molecular subtype characterized by the TEL/AML1 translocation represented a comparatively smaller fraction (4/46) in this study. These results provide a preliminary support for a lower frequency of molecular subgroup of leukemias with a potential for favorable clinical outcome in precursor B-ALL from India.

Publication types

  • Comparative Study

MeSH terms

  • Adolescent
  • Child
  • Child, Preschool
  • Chromosomes, Human, Pair 11
  • Core Binding Factor Alpha 2 Subunit
  • DNA-Binding Proteins / genetics
  • Gene Frequency
  • Histone-Lysine N-Methyltransferase
  • Humans
  • India
  • Myeloid-Lymphoid Leukemia Protein
  • Neoplasm Proteins / genetics*
  • Precursor Cell Lymphoblastic Leukemia-Lymphoma / genetics*
  • Proto-Oncogene Proteins c-ets
  • Proto-Oncogene Proteins*
  • Proto-Oncogenes*
  • Repressor Proteins*
  • Transcription Factors / genetics
  • Translocation, Genetic*

Substances

  • Core Binding Factor Alpha 2 Subunit
  • DNA-Binding Proteins
  • ETS translocation variant 6 protein
  • KMT2A protein, human
  • Neoplasm Proteins
  • Proto-Oncogene Proteins
  • Proto-Oncogene Proteins c-ets
  • RUNX1 protein, human
  • Repressor Proteins
  • Transcription Factors
  • Myeloid-Lymphoid Leukemia Protein
  • Histone-Lysine N-Methyltransferase